The paper is available through anonymous ftp in directory.
The files are LLL.dvi.Z or LLL.ps.Z.
It basically contains the detailed proofs that LLL normalizes in polytime, and that polytime functions can be represented in LLL. ELL and light set-theory/light arithmetic are only sketched. The main reference of this paper "Proof-Nets: The Parallel Syntax for Proof-Theory" is also available at the same source in the files Proofnets.dvi.Z or Proofnets.ps.Z.
Finally a general survey paper "Linear Logic: Its Syntax and Semantics" can be obtained at the same source in the files Synsem.dvi.Z or Synsem.ps.Z.